#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#define NLOOP 5000
int counter;
void *doit( void * );
int main(int argc, char **argv)
{
    pthread_t tidA, tidB;

    pthread_create( &tidA ,NULL, &doit, NULL );
    pthread_create( &tidB ,NULL, &doit, NULL );

    pthread_join( tidA, NULL );
    pthread_join( tidB, NULL );

    return 0;
}
void * doit( void * vptr)
{
    int i, val;

    for ( i=0; i<NLOOP; i++ ) {
        val = counter++;
        printf("%x: %d \n", (unsigned int) pthread_self(), val + 1);
        counter = val + 1;
    }

}
